Machine for applying and drying adhesive on paper goods



May I6, 1944.

.E. G. STAUDE MACHINE FOR APPLYING AND DRYING ADHESIVE ON PAPER GOODS Filed April e, 1942 a sheetssheet 1 llll lll

/N//E/V TOR May 16, 1944.

E. G, STAUDE MACHINE FOR APPLYINGAIID DRYING ADHESIVE ON PAPER GOODS Filed April 6, 1942 A 8 Sheets-Sheet 2 May 16, 1944. l E G sTAUDE 2,348,864

MACHINE EOE APPLYING AND DRYING ADHESIVE oN PAPER GooDs Filed April 6, 1942 8 She ,s-Shef. 5

F76. /L/L lQaJw f May 16, 1944.

E. G. STAUDE MACHINE FORl APPLYING AND DRYING ADHESIVE ON PAPER GOODS 8 sheets-sheet 4- Filed April 6, 1942 May i6, i944. E, Q STAUDE 2,348,864

MACHINE FOR APPLYING AND DRYING ADHESIVE ON PAPER GOODS Filed April 6, 1942 8 Sheets-Sheet 5 ay H6, 1944. E. G. sTAUDE 2,348,864

MACHINE FOR APPLYING AND DRYING ADHESIVE ON PAPER GOODS Filed April 6, 1942 8 Sheets-Sheet 6 May 16, 1944. E. G. STAUDE.

MACHINE FOR APLYING AND DRYINGADHESIVE ON PAPER GOODS Filed April e, 1942 8 sheets-sheet '7 ay 16, 1944. E. G STAUDE 2,348,864

MACHINE FOR APPLYING AND DRYING ADHESIVE ON PAPER GOODS Filed April 6, 1942 8 Sheets-Sheet 8 /NmE/VTOR Patented May 16, 1944 MACHIN FOR APPLYING AND DRYING ADHESIVE ON PAPER GOODS Edwin G. Stande, Minneapolis, Minn.

Application April 6, 1942, Serial No. 437,764

18 Claims.

This invention relates to improvements in my previous machines and methods, which are covered by Patent 2,139,605, Patent 2,248,255, and Patent 2,261,782..

The object of my present invention is t-o provide a gum applying and drying apparatus for the sealing naps of envelopes which is greatly simplified and more compact, cheaper to manufacture and much easier to operate and keep clean.

A further important object is to provide means If 'or returning the surplus adhesive drying malterial in addition to small portions of new material to the dust or powder applying mechanism so that the material may be used over and over automatically as required.

A further object is the introduction of small air currents providing suction at the opening of the mechanism' through which the article to be treated enters and leaves so that very ne part ticles of dust will remain inside of the unit, or

if the turbulence is too great, exhausted into a suitable vacuum cleaner bag. A further object is to provide a constructio that will permit the removal of the surplus dry powdered adhesive through the use of quickly removable, revolving mohair covered discs, wheels or brushes, or other suitable means by deecting the part that is treated at an angle to the plane of travel so that the surplus powder removing discs or wheels may easily reach to the creased line on which a fold may be made later without interfering with the blank carrying mechanism.

A further object is the manner of inducing a dragging and wiping action by the blank deflecting member before the surplus dry powder is removed, the purpose of which is towork the dry powdered adhesive into the wet adhesive thoroughly before wiping off the surplus,'in order to absorb most of the free moisture and obtain .a sufficiently heavy application of adhesive after the surplus dry powder has been removed.

.il further object is to provide a suitable agitating device within the compartment of the adhesive dusting mechanism to prevent plugging up or packing of the powdered adhesive and insure a continuous free flow of the adhesive powder to the dusting mechanism.

Other objects, features and advantages ci the invention will appear in the description ol the drawings and be iur-ther pointed out in the claims. Various modicaticns may obviously be devised witicut departing from my invention and I, therefore, do not limit my invention to the precise construction shown.

Fig. l is a plan view showing my invention attached to an envelope gluing and folding machine, similar tomy Patent 1,144,506, in such manner as to constitute a new and improved method of gumming and drying the sealing aps of envelopes at greatly increased productionl efflciency and reduced cost.

Fig. 2 is an outside view of the casing enclosing the improved glue dusting mechanism of my present invention, and I Fig. 3 is a front en'd view of said casing, while Fig. 4 is a rear view thereof with its rear wall removed to expose the mechanism therein.

Fig. 5 is a sectional view, taken on line 5--5 of Fig. 4 through the upper part of the casing, and showing in enlarged detail the' construction of the vibrating hopper and the powdered glue distributing roll.

Fig. 6 is a plan view showing the top of the casing cut away to expose .the mechanism as it appears when glue dusting a series of fast-moving envelopes.

' Fig. 7 is a horizontal section, on the line l-'l of Fig. 8, through the upper part oi' a transmission gear box, which is mounted in the duster unit casing.

Fig. 8 is a vertical section on line 8--8 of Fig. '7,

and

Fig. 9 is a cross-section on line 6.@ of Fig. 8.

Fig. 10 is an endview ci theimproved wiping roll employed, and

Fig. 11 is a cross-section through said wiping roll as it appears in action on an envelope flap.

Fig. 12 is a detail view showing means for vibrating the powder delivery hopper, while Fig. 13 is aldetail view of the eccentric hub which vimparts the vibratory movement to said hopper, and

Fig. la is a similar view of a sprocket having an. eccentric hub which imparts oscillating motion to an agitating device which prevents packing and accumulation of the glue powder within said casing.

Fig. 15 is an isometric perspective view showing in a. diagrammatic manner the improved method oi applying the gum or glue to the bottom flap and the sealing flap and method of applying the powdered adhesive, the manner of deflecting the sealing naps and working in the dry adhesive into the wet adhesive and the means of removing the surplus dry powdered adhesive and folding both end flaps ofv the envelopes during a single straightaway passage through the rear section of used for applying wet adhesive to the envelope aps, and

Fig. 17 is a side-view of same, partially in section.

Fig. 18 shows how a means may be provided for creating a slight sub-atmospheric pressure in the duster unit casing at the openings of the casing machine Patent 1,144,506, wherein a supply ofenvelope blanks a are disposed in a hopper b where feed wheels c feed the uppermost blank and propel it rearwardly past a lower glue applying and folding mechanism d and e which deposits moist glue on one under edge thereofand turns both side flaps inwardly to become joined in overlapped relation while it travels to a stop against a cross-bar f. At this point, the transversely moving chains g carry the partly folded blanks laterally past glue applying means h-h which deposit a lm of moist glue on the edge of both end flaps thereof, while they are conveyed by means i-i past right side folding means i and left side folding means k which turn both end aps inwardly just before the then completed envelope enters the stacking means l where they are accumulated in a vertical stack m. Of course, when this envelope making machine is operated without the improved glue dusting unit, which forms .the subject matter of this application, the left side glue applying means h is moved out of contact with the passing blanksso that no adhesive will be deposited on the sealing ilap o thereof, and these unfinished envelopes must then be passed through a second glue applying machine, which is provided with special glue drying means, i'or applying and drying adhesive on the sealing ap o or the operation of applying and drying adhesive on the sealing flap may be accomplished before the blank is fed into the hopper b. However, many types of envelopes are used without gummed sealing or closure aps and may be ythus completedv on the above described machine, in which case my improved glue dusting unit may be easily and quickly removed from the machine frame to which it is secured by bolts p.

As shown in Fig. 1, my present glue dusting unit is located on the left side of the right angle section of the machine, immediately in the rear of the glue applying means h, where the fast-moving series of spaced envelopes blanks are rmly gripped by the conveyors 11--1' while they are carried rearwardly with their sealing flap o extending into said glue dusting unit, .s further illustrated by Fig. 6.

The improved glue dusting unit consists of 'a caring or supply chamber W having a sheet metal front panel I5 (see Figs. 2 5-6--7-9) to which a cast metal frame I6 is secured and adapted to support a motor I1 at its outer end and a transmission gear box I8 (see Fig. 7) at its inner end. A spout I9 (see Figs. 2 3) is also provided on the panel I5 into which a supply of powdered glue or other dried powdered adhesive may bev poured into the interioryof the casing or dry powdered adhesive supply chamber for replenishing and a hinged cover is arranged to close the upper end of said spout. A transparent window 2| is also provided in the panel I5, while an upper rear corner section I 5 is hinged to said panel at I5" 7| and adapted to be heid in closed position by a laten z2. (see Fig. 2.)

Sheet metal end'walls 23 are detachably secured to the rear edge of the panel I5 and ex.

tend to and form a part of the rear wall 24 which is thereby spaced from the panel I5 so as to form an enclosed compartment adapted to contain the powdered adhesive and the mechanism for properly applying same to the envelope sealing nap. Angle brackets are secured to the end walls 23 at opposite ends of the casing -and support said casing in position on the frame s of the machine, as shown in Fig. 1, and sheet metal guide brackets 2'6 are disposedabove the brackets 25 .and have a flattened passage 21 leading to a slit in the end walls 23 at each end of the casing. (See Fig. 3.)

, The rear wall 24 has a longitudinal slit 28 whichregisters with the slits at both ends of the casing or supply chamber and strips 29 of a brush-like fabric such as long pile mohair are oppositely attached to the rear wall 24 so as to yieldingly cover said longitudinal slit, as shown in Fig. 5. iA hinged cover 30 is adapted to close a discharge opening 3l in the bottom of the casing or supply chamber for use when it is desired to empty the contents of the compartment or supply chamber while a transparent inspection plate 32 is hinged above an opening in the top of said casing.

Within the casing, angular metal strips 33 are attached to the inside of the front wall 23 at the front end of the casing or supply chamber so as to form a vertical passage 34 in which a series of elevator flights 35 are adapted to carry the powdered adhesive 36 from the bottom to the top of said casing or supply chamber.

The flights 35 are ttached at short intervals to a chain 31 (see F g. 4), which passes around sprockets 38 and 39, located respectively at the bottom and top of the vertical passage 34 and are mounted on studs 40 and 4I which are secured in the front panel I5.

The chain 31 is driven by a sprocket 42 (see Fig. 7) which in turn is driven by transmission gearing as hereinafter described, while said chain also passes over an idle sprocket 43 on a stud 44 near is attached to a chain tightening device consisting of an arm 45 on a short'shaft 46 which extends.

through a bearing in the panel I5 and has a short arm 41 on its outer end, which contacts a set screw 43 whereby said device may be adjusted to take up the slack in said chain.

The dry powdered adhesive normally is a flourlike substance which will not ilow freely but will pack quickly so the elevator nights 35 will work a tunnel through the powdered adhesive and soon cease to function. In order to avoid this, I provide an agitating device which I describe as follows:

The sprocket 38 is provided with an eccentric hub 49 from which a connecting rod 50 extends to a crank pin 5I onv a hub 52 which is mounted on a stud 53 in the central part of the casing, and a number of spokes 52 radiate from the hub 52 to form an agitating device which is adapted to continually loosen any formation of powder which I through bearings ,62 and 63 at opposite ends ofthe gear box I8. A worm 64 is also secured to the shaft 6I and meshes with a worm gear 65 on an over-head cross-shaft 66 which is jour.

naled in bearings 61 and 68 and carries the sprocket 42 on its outwardly projecting end. The front end of the shaft 6I extends beyond the gear box and carries a corrugated roll 69 having eccentric hubs 10, and a disc having fan blades ll is clamped against the outer end of said shaft. Plates i3 andld are spaced apart to enclose the corrugated portion f the roll 69 and .are bored to a running fit on he eccentric hubs 10 thereon, and a sheetl metal hopper I5 is mounted on said plates and is adapted to direct the powder on to the upper part of the corrugated roll (see Fig. 5).

The hopper l5 has a curved portion 'l5' and a cooperating curved member 'i6 has a beveled lower edge which may be adjusted to any desired point below the edge ofthe curved porton 'l5' by a clamping boltll which extends through a curved slot it in the flange it to which the curved member i6 is secured.

The purpose of the beveled lower edge of the member 'it is tov permit adjustment of the delivery of the dry powdered adhesive uniformly over the 'entire area of the wet adhesive on the sealing flap o. This is accomplished by making the outlet of the member lit either on a 30 degree bevel or even a V shaped outlet (see Figs. 4 5) With this construction certain portions of the dry powdered adhesive Will be released tangent from the member t9 While other portions depending on the degree of bevel will be released later thus applying a uniform layer of dry powdered adhesive over the entire area of the wet adhesive on the sealing hap o.

One side wall of the hopper has a looped upper edge du embracing a fixed rod di, which forms a pivot to allow the entire hopper to be oscillated rapidly by the eccentrlcs l@ so as to insure positive delivery of the powder therein to the corrugated roll t@ vas shown in Figs. 5 and l2. and a roller di is mounted on a pin d3 at the upper edge of the hopper and is adapted to transmit the vibratory motion to the chaindl so as to shake the powder from the elevator flights into said hopper, where it is engaged by the corrugated roll 'b9 and sprayed into the passage through which the sealing flap o passes.

The rear end of the shaft ti extends beyond the bearing d3 and has a spline dll enteringlrevways in a number of separable rolls @d which have a hanged periphery accommodating a bejt tt of brush-like fabric, such as long pile mohair, and these rolls are held in position on the shaft by an annular projection di on the hinged corner section i5'.

A fan disc B8 on the collar d@ is keyed on the shaft iii between the rolls mi and the rear end of the gear box, as shown in Fgs. 'l and. 8, an'l a twisted deflector bar gli for. deflecting the sealing flap o is secured to the under side of said gear box by the cover clamping screws di, as shown .in Figs. 8 and 9. A curved shoe @l2 (see Figs. 4.5)

. is arranged beneath the rolls 85 and is supported by arms @t which are hinged at til on the inside of the panel iii. as shown in Fig. 5, and a depending pcrton 9b on one of said arms engages a set screw @il which may be adjusted from the outside of the casing to elevate said shoe int-o contact with the under side of the rolls, for the purpose hereinafter described.

Fig. 15 graphically explains the essential features of my invention, which include: means for moving a continuous procession of spaced envelope blanks while they are treated consecutively at separate points or stations during their passage through the machine, wherein at point A the end aps of the partially folded envelope blanks a receive a film of moist adhesive from the rotating glue wheels h-h; at point Bone glue coated ap is being folded by suitable means gi, while the other moist 'glue-coated flap is being covered with a layer of powdered dry adhesive 36; at point C one flap is completely folded over while the powdered flap is deflected downwardly by the spiral shaped bar 96 which drags over the dry powder and Works same into the wet adhesive and directs the flap o to pass beneath the rolls 85 where the surplus powder is wiped fromsaid ap o and the remaining powder adhering to the wet adhesive is further worked into the' moist adhesive bythe wiping action of the brush-like fabric covering of said rolls; at point D the powder dried sealing flap o which no longer will adhere without re-moistening is folded over by y suitable means It; while at point E the completed envelopes are being delivered into a vertical stack by suitable means l.

Fig. ll shows how the envelope flap o conforms to fit the curvature of the shoe Q2 and is thereby held against the rolls lib while the rolls B5 wipe the surplus powder from said nap, and Fig. 1i also shows how the long hair-like p'le of the fabric is pressed against the iiap by centrifugal Gili Ill

forceso as to press the remaining powder into intimate union with the moist adhesive to absorb the moisture thereof. This combinedrpressing and wiping leaves the gummed sealing hap suiliciently dry to allow immediate stacking of the completely folded envelopes without any tendency of said sealing flap to adhere or stick to the baci: of said envelope.

While I speak of my invention as a drying mechanism as used particularly for drying the gum on scaling naps of envelopes, I do not mean that any water has actually been evaporated by my method. What li do mean is that such moisture as may be in the first light application of wet adhesive is by the addition of dry powdered applying the dry powder adhesive and the rolls 85. a considerable dust turbulence is set up within the dny pswdered adhesive supply chamber or compartment, and this dust has a tendency to escape from the slots 2l at the entrance for the flap o and the slot 2l and the exit of the hap o.

To .rvcrcome the escape of the powdered dust through the slots 2l, I provide the small fan shaped member 'li at the entrance of the flap o with just enough suction to overcome the tendenc-y for the dust to escape and thereby hold some within the compartment.

I also provide a similar fan iid at the exit of the flap o with a similarl slight suction capacity to prevent the clust from escaping at the exit of the slot 21. The slot 28 is sealed by the mohair padding 29.

With this precaution very little dust escapes from the supply chamber or compartment through the passage which must be kept open for the ilap o to enter and leave the supply chamber or compartment.

Figs. 16 and 17 show how the envelope aps are held up against the glue applying Wheels h-h by rolls joumaled in the front end of arms |0|, which are pivoted at |02 and provided with. an adjustable stop screw |03 at their rear end, while a compression spring |04 is arranged to depress said rear end so as to yieldingly support the rolls |00 in their predetermined position beneath said glue applying wheels.

The conveyor belts i-z' pass about the inner end of the rolls I 00-and over anti-friction rollers |05, and a series ofpressure rollers |06 are carried by an inverted channel bar I 01 above the belts i-i to press theenvelope blanks against said belts insuring positive movement of the blanks. Glue pots |08 are suspended from a cross-member |09 andare provided with a comparatively large glue transfer roll H0, which receives a illm of wet adhesive from the smaller rolls and H2, which are partly submerged in the liquid glue` H3, while the pots are hinged at I4 and engaged by an eccentric H5 by which said pots may be tilted slightly with respect to the glue transfer roll |10 so that the rolls H2 and |||.will deposit a film -of glue of desired thickness of said transfer roll H0.

The glue pots are adjustably mounted on the cross-member |09 so that the transfer roll |10 may be placed in position to deposit its ilmA of glue to the glue applying Wheels h-h. A train of gears H6' connect the glue pot rolls with the driven glue wheel shaft I|6 so as to drive the various rolls in the direction indicated by the arrows in Fig. 17. l

I may also further prevent any of the powdered adhesive dust from escaping through the slits 21 and 28 of the compartment while the envelope flaps are passing rapidly through' said slits, by inducing a very slight suction within the compartment by providing a separate suction device with an air strainer bag.- This may be accomplished by providing a small fan ||1 (see Figs. 18-19) on the motor coupling 51 with a special motor base IIB, in which an intake port ||9 communicates with the interior of the compartment while an outlet port |20 leads to a down" wardly extending tube |2| to which an air strainer bag ||2 is removably detached.

'Ihe very low velocity air current produced in this manner is only required to slightly reduce the air pressure within the compartment to cause a slight inward flow of air through the slots 21 and 28 just suiiicient to keep powdered dust froml escaping through said slots and would, therefore, carry away only a comparatively small amount of the powder which would be confined in the bag from which it may be emptied periodically at convenient intervals.

The operation of my invention is as follows: The blank a is fed into the machine at the feed hopper and b (see Fig. 1) one at a time in timed relation. Adhesive is appliedon the under left hand side of the blank which is folded over to make the first center seam adhesive juncture and the partly folded blank is delivered on a right angle transfer section where chains with lugs g move the blank at right angles past a wet adhesive applying mechanism h (see also Figs. 16

and 17) where wet adhesive is applied to the l bottom ap which is immediately folded by the bar i (see Fig. 15) and also to the sealing iiap.

The blank then passes into the slot 20 (see Fig. 5) where dry powdered adhesive is dusted upon the freshly applied wet adhesive by the fast revolving uted member 69.

The sealing ap is then deected by the member 90 which directs the ilap against the periphery of the surplus dry powder adhesive removing member which surplus dry powdered adhesive falls to the bottom of the casing or supply chamber w because the sealing flap is held against the member 85 by the concave member 92.

The supply chamber contains the elevator chain 31 having nights 35 which elevate the dry powdered adhesive supply from the bottom of the supply chamber or casing w to the hopper 15 (see Fig. 5) Where the cycle is again repeated.

To keep the dry powdered adhesive in constant owing condition I provide the agitators 52.

l I do lnot limit the scope of my invention to the precise construction shown because various modications may be devised without departing from my invention.

I believe I am the rst to successfully apply and dry adhesive to flat surfaces in a manner acceptable to the trade and I therefore claim -a broad interpretation of the invention herein set forth.

As a modication of the dusting mechanism including the vibrating hopper 15, I may provide a brush with its axis parallel with the travel of the elevator chain 31 and mounted above the chain 31 at the discharge point and brush' out the dry powdered adhesive between the nights 35 and deliver the dry powdered adhesive directly to the wet adhesive area of the envelope ilap thereby doing away with the vibrating hopper 15 and its associated mechanism. Instead of a chain for elevating the dry powdered adhesive I mayuse a disc wheel having notches on its periphery to pick up the dry powdered adhesive and use the brush likewise to clean out the dry powdered adhesive in the notches and deliver the powder directly to the wet adhesive area.

I claim:

1. In an envelope making machine including a sealing ap gumming and drying mechanism for applying adhesive to the sealing -ilaps of enf velopes and conditioning said adhesive against adhering without remoistening, comprising means for advancing said envelopes: means for applying wet adhesive to said sealing flap; a chamber for yholding a supply of dry powdered adhesive, a slot on the side of said chamber for vthe passage of said sealing flaps within said chamber, means within said chamber for applying dry powdered adhesive to said wet adhesive on said sealing flap; means for removing the surplus d ry powdered adhesive; means for returning the said surplus dry powdered adhesive together with the required additional dry powdered adhesive to the means for applying dry powdered adhesive; driving connections for the moving members within said chamber.

2. In an envelope making machine including a sealing iiap gumming and drying mechanism for applying adhesive to the sealing flaps of envelopes and conditioningsaid adhesive against adhering without remoistening, comprising means for advancing said envelopes: means forapplying wet adhesive to said sealing flap; a chamber for holding a supplyof dry powdered adhesive, said chamber having a slot for the passage of said sealing ilap into and out of said chamber; means including an intake hopper within said chamber for applying dry powdered adhesive to said wet adhesive on said sealing ap; means for removing the surplus dry pow- .dered adhesive together with the required addivelopes and conditioning said adhesive against adhering without remoistening, comprising means for advancing said envelopes: means for applying wet adhesive to` said sealing nap; a chamber for holding a supply of dry powdered adhesive and having a slot for the .passage of said sealing ap into and out of said chamber, means within said chamber for agitating said dry powdered adhesive; means within the chamber for applying dry powdered adhesive to said wet adhesive on said sealing flap; means for removing the surplus dry powdered adhesive from said sealing nap; means for returningthe said surplus dry adhesive together with the required ,additional dry powdered adhesive to the means for applying dry powdered adhesive including a slow moving sprocket chain provided with elevator flights; driving means for the moving members within said chamber.

4. In an envelope making machine including a sealing flap gumming anddrying mechanism forV applying adhesive to the sealing aps of envelopes and conditiening said adhesive against adhering without remoistening comprising means for advancing said envelopes: means for applying wet adhesive to said sealing ap; a chamber for holding a supply of dry powdered adhesive, said chamber having a slot for the passage of said sealing flap into and out of said chamber; a means within'said chamber for applying dry powdered adhesive to wet adhesive on said sealing flap; means within said chamber for deflecting said sealing ap from the normal path of travel; means within said chamber for removing the surplus dry powdered adhesive from wet adhesive on said sealing flap; means for removing the surplus dry powdered adhesive; a concave member for holding said envelope sealing flap against said means for removing the surplus dry powdered adhesive.

6. In an envelope making machine including a sealing flap gumming and' drying mechanism for applying adhesive to the sealing flaps of envelopes and conditioning said adhesive against adhering without remoistening, comprising means for advancing said envelopes: means for app1y ing wet adhesive to saidsealing nap; a chamber for holding a, supply of dry powdered adhesive, said chamber having a slot for the passage of said sealing ap into and out of said chamber; means within said chamber for applying dry powdered adhesive to wet adhesive on said sealing flap; means within said chamber for deiiecting said sealing flap below the path of travel of said blank ;V means within said chamber for removing the surplus dry powdered adhesive including a concave member for holding said deected sealing ap against said dry powdered adhesive removing means; means for returning said surplus dry powdered adhesive together with the required additional dry powdered vadhesive to the means i or applying dry powdered adhesive; driving connections for said moving members 7. In an envelope making machine including a sealing nap gumming and drying mechanism for applying adhesive to the sealing flaps of envelopes and conditioning said adhesive against adhering without remoistening, comprising means for advancing said envelopes, means for applying wet adhesive to said sealing flap; a

chamber for holding a supply of dry powdered adhesive, said chamber having a slot for the passage of said sealing flap into and out of said chamber; means within said chamber for applying dry powdered adhesive to said wet adhesive on said sealing flap including a fast revolving uted member, a hopper for said uted member; means for vibrating said hopper; means within said chamber for removing the surplus dry powdered adhesive from said sealing flaps.

I 8. A paper fabricating machine adapted to produce an article having a gummed surface which is suiciently lacking in moisture to prevent adhesion without remoistening, comprising: means for advancing said article; means for applying wet adhesive to said article; a chamber having a slot on one side for the passage of articles; means within said chamber for applying dry powdered adhesive to the wet adhesive on Asaid article; meanswithin said chamber for y removing surplus dry powdered adhesive from said article; means within said chamber for agitating said dry powdered adhesive; means within said chamber including an endless carrier belt, for returning the said surplus dry adhesive together with the required additional dry powdered adhesive to the means for applying dry powdered adhesive; driving connections for the moving members.

9. .A machine for applying and drying adhesive to an article having a :dat surface, comprising:

means for advancing said article; means for applying a liquid adhesive to a predetermined area of said article; a chamber having a slot on one side for the passage of articles, means within said chamber .including a single revolving member operating at high speed for applying dry powdered adhesive over the liquid adhesive to remove the adhesive characteristic; means within Asaid chamber for removing the surplus dry adhesive; means within said chamber for returning the surplus dry powdered adhesive to the means for applying dry powdered adhesive; driving connections for the moving members.

10. A machine for applying and drying adhesive to an article' having a flat surface comprising: means foff'advancing said article; means for applying liquid adhesive to a predetermined area of said article; a chamber for holding a supply of dry powdered adhesive, a slot on one side of said chamber to permit the entrance and exit of a portion of said article means within said chamber for applying dry powdered adhesive over the liquid adhesive to remove the adhesive characteristic; means within said chamber for deiiecting a portion of said article from the normal path of travel; means within said chamber for removing the surplus dry powdered adhesive; concave means within said chamber for holding said deected portion of said article against said surplus removing means; a dry powdered adhesive agitator within said chamber to prevent packing of said dry powdered adhesive; means within said chamber for returning said surplus adhesive together with the required additional dry powdered adhesive to the means for applying the dry powdered adhesive; driving means for the moving members.

11. A machine for applying and drying adhesive to an article having a. at surface comprising: means for feeding said article; ymeans for applying wet adhesive to predetermined areas of said article; a chamber for holding a supply of dry powdered adhesive, a slot on one side of said chamber to permit the entrance and exit of a portion of said article, means within said chamber for applying dry' powdered adhesive over said wet adhesive including a fast revolving member mounted within an intake hopper having an open end; means for vibrating said hopper; a curved member within said chamber for deecting the adhesive treated portion of said article; rotating discs within said chamber provided with brushing material on the periphery of said discs for removing the surplus dr'y powdered adhesive; a concave member within said chamber for holding said deflected portion of said article against the brushing material on said discs; an elevator within said chamber for returning the surplus dry powdered adhesive together with the required additional dry powdered adhesive to the intake hopper of the means for applying the dry powdered adhesive; an agitator within said chamber to prevent packing of said dry powdered adhesive; driving means for the moving members.

12. A machine for -applying and drying adhesive to an article having a fiat surface comprising: means for advancing said article; means for applying wet adhesive to predetermined areas o1' said article; means for applying dry powdered adhesive over said wet adhesive; means for removing surplus dry powdered adhesive 'from predetermined areas of said articles; a chamber enclosing the said means for applying dry powdered adhesiveand said means for removing the surplus; slots in said chamber to permit entering of the wet adhesive portion of said flat article and 'leaving same; driving means for the moving members.

13. A machine. for applying and drying adhesive to an article having a iiat surface including advancing means for said article, comprising: means for applying wet adhesive to predetermined areas on said article; means for applying dry powdered adhesive over said wet adhesive; means for removing surplus dry powdered adhesive from predetermined areas of said articles; a chamber enclosing the said means for applying dry powdered adhesive and said means for removing the surplus; slots in said chamber to permit entering of the wet adhesive portion of said iiat article and leaving same; suction apparatus for causing a slight suction on the inside of said chamber near said slots to prevent applying dry powdered adhesive and said means for removing the surplus; slots in said chamber to permit entering of the wet adhesive portion of said flat article and leaving same; suction apparatus including an air strainer bag for causing a slight suction on the inside of said chamber near said slots to prevent escape of dust particles through said slots during the normal operation of the machine; driving means for the moving members.

15. A machine for applying and drying adhesive to an article having a ilat surface including advancing means for said articles, comprising: means for applying wet adhesive to predetermined areas on said article; a chamber for` holding a supply of dry powdered adhesive; a slot on one side of said chamber to permit the entrance and exit of a portion of said articles; means Within said chamber for applying dry powdered adhesive over said wet adhesive; means for removing surplus dry powdered adhesive from predetermined areas of said articles; a driven shaft located within said chamber and having its axis parallel with the direction of travel of said f article through the machine; connections on one escape of dust particles through said slots during end of said shaft for operating said means for applying dry powdered adhesive; connections on the opposite end of said shaft for operatmg the said means for removing the surplus dry powdered adhesive a driving gear on said shaft having right-angle gear connections with a suitable source of power.

16. A machine for applying and drying adhesive to an article having a at surface includlng means for advancing said article comprising: Y

means for applying wet adhesive tov predetermined areas of said article; a dry powdered adhesive supply chamber; slots in said chamber to permit entering and leaving of a portion of saidv article; exible means for sealing said slotsv to permit the passage of a part of ysaid-article and prevent escape of surplus dry powdered adhesive; means within said dry powdered supply chamber for spraying dry powdered adhesive over said wet adhesive; a high speed rotary member for removing the surplus dry powdered adhesive from said article; an oscillating member within said chamber to prevent said dry powdered adhesive from packing; means for elevating said dry powdered adhesive from the bottoml of said chamber to supply said means for spraying dry powdered adhesive over said wet adhesive; driving means for the moving members.

17. A machine for applying and drying adhesive to an article having a flat surface'including means for advancing said article, comprising: means for, applying wet adhesive to predetermined areas of said article; a chamber for holding asupply 0f dry powdered adhesive, a slot on one. side of said chamber to permit the entrance and exit of a portion of said article; a high speed revolvingmember within said chamber for spraying dry powdered adhesive over said wet adhesive; a spiral-shaped member within seid chamber for deacting e portion oi seid article; high speed rotary member within said chelmber for removing the surplus dry powdered adhesive; a concave member within said chamber for holding a, part of seid article against said high speed rotary member; en oscillating member within said chamber to prevent said dry powdered adhesive from pecking; en elevator within said chamber including en endless belt for elevating said dry powdered adhesive to supply said single hish speed revolving member; driving .connections for said moving members.

i8. in an envelope mening machine including e. sealing nap summing and drying mechanism for applying adhesive to the sealing ilnps of envelopes and conditioningfssiid adhesive against chamber for holding a. supply oi dry pnvvderedV 20 adhesive; n slot on one side oi seid chamber to permitthe entrance end emt of seid sealing dan; means .within seid chamber for applying dry powdered adhesive to wet ndhesive on seid seeling flap; means within seid chember for deflecting seid eenling nap below the path' or travei of seid blnnls; means within seid chember for removing the surplus dry powdered adhesive: means within said chamber for holding seid deilected sealing nep against seid dry powdered adhesive removing means; ineens within said chamber for returning seid surplus dry powdered ndhesive together with the required additional dry powdered adhesive from thebottoin of said chamber to the ineens for applying dry powdered adhesive; suction fen located `within seid charnber neer the entrance end exit of seid sealing dep into seid chsmber; driving connections for seid moving members.

mm G. STAUDE. 

